Dental cosmos . thenalso a gelatin is formed, butit partially loses its power of coagulating, vol. xxxv.—8S 1273 1274 THE DENTAL COSMOS. I procured the jaws of a fresh-killed old cow, of a calf, and of ayoung pig. The teeth were broken open, the fresh pulps carefullyremoved and collected in a test-tube. After a few drops of water hadbeen added, the ends of the tube were melted up. This is easily donewithout warming the contents of the tube to any appreciable extent. In this manner I collected the pulps of all the milk-teeth of thecalf, and of the permanent teeth, which were in various stages o
Dental cosmos . thenalso a gelatin is formed, butit partially loses its power of coagulating, vol. xxxv.—8S 1273 1274 THE DENTAL COSMOS. I procured the jaws of a fresh-killed old cow, of a calf, and of ayoung pig. The teeth were broken open, the fresh pulps carefullyremoved and collected in a test-tube. After a few drops of water hadbeen added, the ends of the tube were melted up. This is easily donewithout warming the contents of the tube to any appreciable extent. In this manner I collected the pulps of all the milk-teeth of thecalf, and of the permanent teeth, which were in various stages ofdevelopment. In the pig. the permanent cuspids and the first molarswere just on the point of breaking through. These pulps were spe-cially collected, and also those of the still undeveloped premolars andsecond molars. In order to check the experiment, it was necessaryto inclose also a few pieces of peridental connective tissue and of themucous membrane of the jaws of the pig in a test-tube. The five Fig. Fig. 12.—Hxperemie pulp of cuspid of man < twenty-three years). Ground section throughthe neck portion, according to v. Kochs petrifying method. N, neive; C, capillaries; S, slumbering cell. 300 diam. Drawn from a photomicro. tubes were then wrapped in a cloth, tied up, and for two hoursexposed to a temperature of 1150 C. in a vulcanite boiler. Aftercooling down, the solution of the fifth tube, containing typical con-nective tissue of the pig, coagulated at once into a thick jelly. Thefluid obtained from the pulps of the cow did not coagulate, but assumeda somewhat thickish consiste?ice; the solution in the three other tubesremained permanently thin fluid. To remove all doubt, all the solu-tions were chemically examined. The director of the chemical labora-tory of this university, Professor Baumann, was kind enough toundertake the investigation. After the dissolved albuminous matterhad been precipitated with lead acetate, the solutions were tested forgelatin by thr
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